PSLE At first, Opal had an equal number of pink and yellow stickers . She gave away
25 of her pink stickers and some yellow stickers. In the end, she was left with
23 of her stickers. What fraction of the yellow stickers did Opal give away?
|
Pink |
Yellow |
Total |
Comparing pink stickers and yellow stickers at first |
1x5x3 = 15 u |
1x5x3 = 15 u |
2x5x3 = 30 u |
Before |
5x3 = 15 u |
15 u |
3x10 = 30 u |
Change |
- 2x3 = - 6 u |
- 4 u |
- 2x10 = - 10 u |
After |
3x3 = 9 u |
11 u |
1x10 = 20 u |
After
3x3 =
9 u11 u
1x10 =
20 uThe number of pink stickers at first is repeated. Make the number of pink stickers the first the same. LCM of 5 and 1 is 5.
The total number of stickers at first is repeated. Make the total number of stickers at first the same. LCM of 10 and 3 is 30.
Number of yellow stickers that Opal was left with
= 20 u - 9 u
= 11 u
Number of yellow stickers that Opal gave away
= 15 u - 11 u
= 4 u
Fraction of the yellow stickers that Opal gave away =
415 Answer(s):
415